News tagged with radiation
Mars methane linked to meteorites
Tiny amounts of methane in the Martian atmosphere may come not from living things, but from meteorites on the red planet's surface, the latest findings suggest.
Space & Earth / Space Exploration
May 31, 2012 |
4.7 / 5 (3) |
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Exploring Mars in the Austrian Alps
In the largest ice caves on Earth, spacesuits and remote-controlled planetary rovers were for the first time tested in a five-day odyssey in the Alps designed to mimic potential future missions on Mars.
Space & Earth / Space Exploration
Jun 01, 2012 |
5 / 5 (1) |
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Japan firm unveils radiation-gauging smartphone
Mobile phone operator Softbank on Tuesday unveiled a smartphone that can measure radiation as consumers in Japan clamour for reassurance following last year's Fukushima nuclear disaster.
Electronics / Consumer & Gadgets
May 29, 2012 |
5 / 5 (2) |
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Sensing the infrared: Researchers improve infrared detectors using single-walled carbon nanotubes
(Phys.org) -- Whether used in telescopes or optoelectronic communications, infrared detectors must be continuously cooled to avoid being overwhelmed by stray thermal radiation. Now, a team of researchers from ...
May 23, 2012 |
5 / 5 (2) |
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Researchers uncover how plant skin is assembled
(Phys.org) -- For the first time, scientists have identified how a plant's skin is assembled.
May 22, 2012 |
5 / 5 (3) |
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Building 45 payloads for balloon mission
Robyn Millan's lab is a little crowded at the moment. It overflows with electronics. And foam. And parachutes and aluminum frames and drills. Based at Dartmouth College in Hanover, NH, Millan and her students ...
Space & Earth / Space Exploration
May 30, 2012 |
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Physicists propose test for loop quantum gravity
(PhysOrg.com) -- As a quantum theory of gravity, loop quantum gravity could potentially solve one of the biggest problems in physics: reconciling general relativity and quantum mechanics. But like all tentative ...
Jan 03, 2012 |
4.3 / 5 (34) |
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Fukushima radiation mostly within accepted levels: WHO
Radiation affecting residents in Japan's Fukushima prefecture since the nuclear plant disaster is below the reference level for public exposure in all but two areas, the World Health Organization said Wednesday.
May 23, 2012 |
5 / 5 (2) |
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Astronomers solve mystery of vanishing energetic electrons in Earth's outer radiation belt
UCLA researchers have explained the puzzling disappearing act of energetic electrons in Earth's outer radiation belt, using data collected from a fleet of orbiting spacecraft.
Jan 29, 2012 |
4.5 / 5 (11) |
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Detection of cosmic effect may bring universe's formation into sharper focus
(PhysOrg.com) -- The first observation of a cosmic effect theorized 40 years ago could provide astronomers with a more precise tool for understanding the forces behind the universe's formation and growth, ...
Mar 20, 2012 |
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Hubble observes a dwarf galaxy with a bright nebula
(Phys.org) -- The NASA/ESA Hubble Space Telescope has made detailed observations of the dwarf galaxy NGC 2366. While it lacks the elegant spiral arms of many larger galaxies, NGC 2366 is home to a bright, ...
May 10, 2012 |
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Climatic effects of a solar minimum
An abrupt cooling in Europe together with an increase in humidity and particularly in windiness coincided with a sustained reduction in solar activity 2800 years ago. Scientists from the German Research Centre for Geosciences ...
Space & Earth / Earth Sciences
May 06, 2012 |
4.5 / 5 (13) |
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Ultraviolet protection molecule in plants yields its secrets
Lying around in the sun all day is hazardous not just for humans but also for plants, which have no means of escape. Ultraviolet (UV) radiation from the sun can damage proteins and DNA inside cells, leading ...
Feb 09, 2012 |
5 / 5 (6) |
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Probing hydrogen under extreme conditions
(Phys.org) -- How hydrogen--the most abundant element in the cosmos--responds to extremes of pressure and temperature is one of the major challenges in modern physical science. Moreover, knowledge gleaned ...
Apr 13, 2012 |
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Organic compounds found in proto-planetary disks
(PhysOrg.com) -- A new study from scientists in the US has reported that organic compounds could be formed in proto-planetary disks, and could have seeded the development of life in our own and other planetary ...
Mar 30, 2012 |
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Radiation
In physics, radiation describes any process in which energy emitted by one body travels through a medium or through space, ultimately to be absorbed by another body. Non-physicists often associate the word with ionizing radiation (e.g., as occurring in nuclear weapons, nuclear reactors, and radioactive substances), but it can also refer to electromagnetic radiation (i.e., radio waves, infrared light, visible light, ultraviolet light, and X-rays) which can also be ionizing radiation, to acoustic radiation, or to other more obscure processes. What makes it radiation is that the energy radiates (i.e., it travels outward in straight lines in all directions) from the source. This geometry naturally leads to a system of measurements and physical units that are equally applicable to all types of radiation.
For more information about Radiation, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
